Learning Regular Expressions can seem tedious however with a little knowledge you can programmatically select or validate specific text in a few lines of code. key: \d = digit; \w = alphanumeric; \s space (includes tabs and line-breaks)
irb(main):462:0> "happy"[/\d/] => nil irb(main):463:0> "happy"[/\w/] => "h" irb(main):464:0> "123 happy"[/\w/] => "1" irb(main):465:0> "123 happy"[/\d/] => "1" irb(main):466:0> "123 happy"[/\d\s/] => "3 " irb(main):467:0> "123 happy"[/\d{3}/] => "123" irb(main):468:0> "123 happy"[/\d{3}\s\w{3}/] => "123 hap"
